Machine and method for making carboys or large glass containers



H. M. BROWN.

MACHINE AND METHOD FOR MAKING CARBOYS 0R LARGE GLASS CONTAINERS.

' APPLICATKON FILED FEB. 28, 1919.

, 1,334,648. Patented Mar. 23, 1920,

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A TTORNEYS H. M. BROWN.

MACHINE AND METHOD FOR MAKING CARBOYSOR LAR GE GLASS CONTAINERS.

APPLICATION HLED FEB.28, 1919.

1,334,648- Patented Mar. 23,1920.

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INVENTOR- JfiZzrr g -72 firozwz,

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H. M. BRUWN. MACHINE AND METHOD FOR MAKING cmovs 0R LARGE GLASSCONTAINERS. APPLICATION FlLED FEB. 28,1919 1,334,648. Patented Mar. 23,1920.

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INVENTOR.

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UNITED STATES PATENT OFFICE.

HARRY M. BROWN, or BROOKLYN, NEW roan, assrenon TO srnme s'rorrnnCOMPANY, or BROOKYLN, NEW "YORK, A CORPORATION onnnnnwnnn.

MACHINE AND METHOD FOR MAKING CAIR'BOYS OR LARGE GLASS CONTAINERS.

Specification of Letters Patent. Pflitgllliefl Mar. 23, 1920-Application filed February 28, 1919. Serial No. 279,809.

To all whom it may concern:

Be it known that I, HARRY M. BROWN, a citizen of the United States,residing at 217 Duliield street, Brooklyn, in the county ot liings andState of New York, have invented a new and useful Improvement inMachines and Methods for Making Catboys or Large Glass Containers, ofwhich the following is a specification.

This invention relates particularly to the manufacture of carboys orother largeglass containers, and to a machine adapted to suchmanufacture; and the primary object is to provide an improved method ofmanufacture and a machine adapted to such manufacture which is simple inconstruction, easy of operation, and of large output capacity, adaptedfor the commercial production of cal-boys, or other large containers,provided with internally-threaded mouthportions adapted to receivethreaded stoppers.

it further object is to provide a simple machine of the characterindicated, which is labor-saving in operation.

The invention is illustrated, in a preferred simple embodiment, in theaccompanying drawings, in which- Figure 1 represents a broken verticalsectional view of the improved machine, or press, the section beingtaken approximately as indicated at line 1 of Fig. 2, and the dottedlines indicating the bodily shifted. position of the plunger of the moldand its actuating mechanism; Fig. 2, a plan sectional view takenapproximately as indicated at line 2 of Fig. 1, one of the mold. locksmounted on the carriage being indicated by dotted lines, however; Fig.3, a broken rear elevational. view of the machine; Fig. 4, a verticalsectional view taken approximately as indicated at line a of Fig. 1;Fig. 5, a broken sectional view of the mouth of the carboy or container,the section being taken as indicated at line 5 of Fig. 6'. Fig. 6, abroken axial sectional view of the moutlrpertion of the container; Fig.7, an enlarged broken central vertical sectional view, showing themandrel and its actuating mechanism; Fig. 8, an end view of the mandreland an elevational view, partly sectional, of the air-cooling means forthe mandrel; Fig. 9, a broken side elevational view of the mandrel; andFig. 10,

a broken front perspective view of the plunger which serves to press theglass into the mold in the operation of forming the head of the carboy,said plunger itself serving as a section of the mold when completelydepressed.

In the embodiment illustrated, A represents the bed, or base-plate, ofthe machine,

.mounted on legs A; B, a three part neckmold mounted on the bed A andadapted to be opened and closed by means of footactuated mechanism B; C,an arbor having one end projecting into the mold, said arbor beingequipped with collapsible means for forming thread-segments in theinterior of the bottle-mouth, the mandrel being projected into the moldand retracted, as de sired, by mechanism C; D, mechanism for forcingmolten metal into the mold, said mechanism being mounted on a carriage Dwhich is shiftable on the bedplate A by means of mechanism D and E, amandrel cooling device mounted on the bed-plate A. The carriage D hasits uprights equipped *ith elongated mold-locking cams D (one shown infull lines and one in dotted lines in Fig. 2), which serve to lock theclosed mold, both when the mechanism D is in the full line position andin the dotted line position shown in Fig. l. lVhen, however, thecarriage D is wholly retracted, the mold can be opened to permit removalof the earboy. locked by the members D while the mechanism D is in thedotted line position shown in Fig. 1 during the introduction of themetal plastic glass) into the charging chamber which forms an upwardextension of the mold; and the members D also lock the mold when themechanism D is in posi' tion for performing the pressing operation.Because of the desirability of preventing the mold-sections fromspringing apart during the application of heavy pressure, however, it ispreferred to equip the plunger of the mechanism D with a loosely mountedlocking cap D", which drops into locking position when the plungerbegins to descend.

The frame of the machine may be of any suitable construction. Preferablyit comprises the bed plate A supported as shown; and the construction ofthe machine is such as to permit a carboy F to be disposed hori- Themold is held zontally in front of the machine, with the neck of thecarboy projecting into the mold B.

The earboy is usually blown in an iron mold, in which it is formed witha neck- 7 portion 1, which requires to be reinforced and provided withan internal thread, or with internal thread-segments, which operation isperformed in the machine herein described. While the carboy, or theneck- 7 portion thereof, is hot, it is entered in the mold B; and a gobof hot ormolten glass is introducedan'd.pressed into the mold,

the mandrel being in the position shown in Fig. 1. In this operation,the head and mouth-portion of the carboy is formed and becomespractically integral with the neck of the carboy, and the mouth-portionis provided with internal thread-segments.

The mandrel is then withdrawn, the levers or thread-equipped segments ofthe mandrel being first collapsed, and the carriage D is whollyretracted, which enables the mold to be opened, thus permitting thecarboy to be lifted out of the mold. The carboy is .then placed in anannealing furnace where it. remains until properly tempered.

The mold B comprises a lower half-section 2, which is firmly securedupon the bedplate A by any suitable means (not shown) and a pair ofupper quarter-sections 3 charge of molten metal or plastic glass,

completely depressed.

which is to be pressed into the mold to form the carboy-head. Thiscavity preferably is of rectangular cross-section and through it isadapted to work snugly the plunger, which is of correspondingcross-section and whose'lower end forms a portion of the wall of themold-cavity when the plunger is The upward extensions 3 have their outersides equipped with lock-engaging lugs 3, adapted to be engaged by themold-locking cams D 7 The neck-mold B is adapted to be opened and closedby means of the mechanism B,

' comprising a vertical plunger 6, working through the bed-plate A andequipped at its upper end with a cross-head 6; a pair of links 6connecting said cross-head with the arms 3 of the quarter-sections 3 ofthe mold; and'a foot-lever 6 whose inner end is connected, by a link 6to the lower end of the plunger 6. Assuming the mold to be unlocked,depression of the outer end of the foot-lever 6 will elevate the plunger6 and throw the quarter-sections 8 of the mold to the open position.Reverse movement of the foot-lever, as by means of a weight 6 will closethe mold; or the weight of the mold-sections 3 and the plunger may bedepended upon to close the mold, when the pressure upon the foot-leveris removed.

The mandrel C is adapted to be projected and retracted by a cross-head 7carried by a pair of plungers, or stems, 7 (Fig. 2), said plungers 7extending through stuffing boxes 7 into cylinders 8, and being equippedwithin the cylinders with pistons 7 in the usual manner, as indicated bydotted lines in Fig. 7. The pistons are preferably actuated forwardlyand backwardly by compressed air, the admission and exhaust beingcontrolled by a valve 9 which is equipped with a handle, or controllinglever, 9, located within convenient reach of an operator standing inposition to operate the foot-lever 6.

The mandrel C extends freely through a perforation with which thecross-head 7 is provided at a central point. The rear portion of themandrel extends through a guide 10, which is provided in a wall formedintegrally with and interposed between the cylinders 8. Fig. 7 shows themandrel in its completely projected position, in which position ashoulder, or nut, 11, on the rear end of the mandrel engages the rearwall of the guide. The front end of the mandrel is equipped with a tip12 which is adapted to extend into the mold-cavity, so that theendportion of the carboy-neck will embrace the mandrel. The tip 12 isprovided at its base with an enlarged portion 12 which 1218 slots, orrecesses, 13, which accommodate a pair of oppositely disposed levers 14,carried by pivots 15. The front end-portions 145 of the levers 141 areshaped to 0011- form to the reduced tip-portion 12 of the mandrel, ofwhich they, in effect, form collapsible sections. The tip-portions 1stof the levers are provided with thread-segments 14", formed by makingsuitable counter-sinks in the tip-portions, so that when the moldingoperation is performed the inner wall of the carboy-mouth will beprovided, as shown in Figs. 5 and 6, with projecting, or raised,thread-segments 15",

separated by segmental spaces 15. Thus the carboy will be adapted toreceive a glass stopper equipped with corresponding threadsegments whichcan be entered through the spaces 15 after which the stopper can berotated into interlocking engagement with the thread-segments 15. Thus.the stopper is introduced by a longitudinal movement and secured by apartial rotation in a manner similar to that in which the breech-blockof a large gun is introduced and secured in place.

The mandrel C, which, as stated, extends freely through a perforation inthe crosshead 7 is equipped with a lever-actuating block, or sleeve, 16,which is slidably mounted on the mandrel. The mandrel is tubular, asshown in Fi 7 and within the mandrel is a tension spring 17 whose rearend is connected, by a pin 18, with the rear end of the mandrel, andwhose front end is connected, by a pin 19, with the lever-actuatingmember 16. That is, the ends of the pin 19 are fitted into perforationsin the sleeve 16, and the pin 19 works freely in a slot 20 with whichthe tubular mandrel is provided. In the projection of the mandrel, thecross-head 7 bears against the rear end of the lever-actuating member16; and when the cross-head is projected, it moves the member 16 towardthe mold, and the tension of the spring 17 is sui'iicient to cause themandrel to move with the member 16. Wlien, however, the stop 11 on therear end of the mandrel engages the rear end of its guide, the mandrelcan move no farther and the continued movenientof the cross-head slidesthe member 16 on the mandrel and actuates the levers 1-1 in such manneras to separate the threadedend-portions. When the cross-head isretracted, the spring 17 retracts the member 16, thus collapsing orsheathing the thread-equipped ends of the levers, so that the threadswill clear the threads in the mouth of the container. The mandrel isequipped with a rigidly-secured collar 21 disposed a short distance backof the cross-head 7, so that after the mandrel is collapsed it will bewithdrawn by the cross-head T engaging the collar 21. The range ofmovement of the pistons is sufficient to effect the complete withdrawalof the mandrel from the mold; or, at least, it should be sufiicient tocause the mandrel to clear the mouth of the carboy, so as to permitremoval of the carboy from the mold.

The leveractuating member 16 is equipped with lugs 16 provided withinclined or divergent cam-slots 16 The cam slots 16 are engaged bycam-studs with which the rear ends of the levers 11 are equipped. Thus,it will be understood readily that when the member 16 slides forwardlywith relation to the mandrel the front ends of the levers will beseparated; and when the member 16 is retracted by the spring 17, duringthe recession of the cross-head 7, the front ends of the levers 1-1 willbe forced tmnird each other, or collapsed.

The mandrel tip is provided, in front of the enlarged portion 12, with ashoulder affording a wall for the front edge, or lip, of thebottle-mouth; and the levers are correspondingly shouldered to continuethis wall across thereccsses in which the levers are located.

T he mechanism D for forcing the molten metal, that is, the hot plasticglass. into the mold, comprises: a plunger 2a on the lower end of apiston-rod 2 3, whose upper end is equipped with a piston 2 1"; apressure cylinder 25 adapted to receive airor fluid under pressure foractuating the piston in both directions; a pressure pipe 26 adapted todeliver fluid under pressure to the cylinder; a valve 27 controlling theadmission to and exhaust from the cylinder. The valve 27 is equippedwith an actuating-handle 28 which is located within convenient reach ofan operator standing inposition to operate the foot-lever 6. Thecylinder 25 is provided with ports 18 which serve alternately asadmission and exhaust ports for admitting pressure to either end of thecylinder and permitting exhaust from the other end. T he plug-valve 27is provided with suitable ports to regulate the admission. and exhaust.

The carriage D, which is movable forwardly and rearwardly, that is,longitudinally with respect to the mandrel C, coinprises a pair ofslides "29, mounted on horizontal guide-bars 30 fixedly secured tosupporting brackets 31 rigidly mounted on the bed-plate A; standards 32fitted in the tubular sockets 52?? which are formed integrally with thetubular slides :29; and fittings 33 fixedly secured on the upper ends ofthe standards 32 and serving to support the cylinder 25, which is firmlyconnected to the fittings 33, as by means of screws, or bolts, 3 1. Itthus appears that the carriage may be shifted rcarwardly to carry thecylinder to "the dotted position shown in Fig. 1, thus bodily shiftingthe mechanism D so as to uncover the mold B. The locking cams D comprisearms carried by split clamping-rings 35 which are secured on theuprights 32 just above the fittings 29. The cams I) are adapted to makesliding contact with the lock-lugs 3" of the upper moldsections.

The mechanism D for shifting the carriage D" preferably comprises atransverse rock-shaft 3 ournaled in brackets 37 secured to the rear endof the bed-plate 31, said rock-shaft being equipped with a hand lever36*, which, when the mechanism D is in operative position, inclinesforwardly somewhat, as shown by the full lines in Fig. 1; a pair ofshort arms 38 rigidly secured to the rock-shaft; and a pair of links 39connecting the arms 38 with the tubular slides 29. The hand-lever 36 isdisposed at the same side of the machine as the foot lever 6, withinconvenient reach of an operator standing in position to actuate thefoot-lever.

The mandrel-cooling device E preferably comprises a hollow annular ring10, with which communicates an air-pressure supply pipe 40 which extendsthrough and is secured to the bed-plate A. The hollow annulus 40occupies a vertical plane a short distance back of the mold, and themandrel extends therethrough. When the mandrel is withdrawn, it will becooled by air currents directed upon it from the annulus 40, which hasits inner Wall provided with a series ofperforations 40 Compressed airis supplied to the cylinders 8 of the mechanism Cf through a iiexi- Vble pipe, or hose,.9.

, As already mentioned, the plunger 24; is of, rectangularcross-section, and works snugly inithe vertical passage of the moldpletely depressed position Thus, the plun ger itself serves as asectionof the mold.

In accordance with the improved method of carboy manufacturecontemplated by this inventiomthe vertical channel of the mold in whichthe plunger 24lworks is of' sufficient capacity to hold the necessaryamount of plastic glass to form the mouth-portion of the bottle, orslightly more than the necessary amount; and the glass is allowed toflow from a collecting rod, or paddling rod, into the cavity until it isapproximately filled, and is. then snipped ofi by theoperator, who,aftershifting the mechanism D to the full line position shown in Fig. 1,then-operates the valve 27 through the medium of the lever 28 to admitpressure to the upper end of the cylinde-r25, thereby causing the pistonto descend, so that the plunger 2% will force the glass into the annularspace about the mandrel, it beingass-umed, of course, that the neck ofthe carboy has already been entered inthe mold by an assistant. As theglass flows into the mold-cavity, it flows over and about theend-portion of the neck of the can boy and becomes thoroughly weldedthereto and virtually integral therewith. The piston 24 continues itsdownward descent until the lower .endof the piston occupies the annularplane of the circumferential wall of the mold-cavity,the plastic glassbeing wholly expelled from the channel in Which the plunger Qlworks. Theoperator soon acquires the faculty of measuring, with the eye,approximately the correct amount of glass required forforming themouth-portion ofthe bottle; and he designedly uses a slight excess ofglass, so that as the plunger 24 comes to the lower end of its traverse,the pressure will force the carboy shghtlyaway from the mold, it beingunderstood that the die is so formed as to permit this action, and theassistant permits the carboy to recede slightly under this pressureafter the moldthis cup of .of glass with the mouth-portion of thecarcavity has been filled to its capacity. In Fig. 7, the dotted line 41indicates approximately the original end-portion of the neck of thecarboy, that is, the end-portion of the neck before the lass which formsthe reinforcement of the neck and mouth of the bottle has been forcedinto the mold. Preferably, the

outer circumferential surface of the original .-method of manufacture isthat the'mouthportion of the carboy may 'be given a smooth exterior inthe pressing operation, and there is no wastage of glass. Heretofore, ithas been the practice to employ a charging cavity of larger diameterthan the plunger which serves to force the charge into the .mold-cavity,so that a cup of glass forms about the plunger in the charging cavityduring the pressing operation, the bottom of glass being connected by arod boy; and it has been necessary. following such practice, to breakthis cup off, this practice involving a considerable wastage of glassbesides being otherwise objectionable.

It is believed that the operation will be fully understood from thedescription given. It may be added, however, that after the pressingoperation, the perator turns the handle 28 so as to admit pressure tothe lower end of the cylinder and exhaust the air from the upper end ofsaid cylinder, so

that the piston 24; will raise the plunger Qt from the mold. As theplunger 24C nears the upper end of its traverse, it lifts the lockingcap D* from the mold extensions 3". T he operator then. through themedium of the lever 36. shifts the pressure mechanism 1) rearwardly asfar as it will go, thus withdrawing the locking cams D from the mold.The operator then depresses the foot-lever 6, thus throwing the upperquarter-sections of the mold open, so that the carboy can be removed. 7At the desired instant, the operator turns the handle 9 so as to admitpressure to the front ends of the cylinders S, and at the-same timepermit the rear ends of said cylinders to exhaust, so that thecross-heads 7 will be retracted, thus causing the mandrel to becollapsed and then withdrawn from the mold. It is usually desirable toperform this operation before causing the plunger Qt to be withdrawn,and before the mold is unlocked. During the interval when the carboy isbeing removed and replaced by a fresh carboy, the air delivered by thecooling device E plays on the mandrel, so that it will not becomeexcessively hot when subjected to repeated operations. Usually, also,the operative end of the mandrel is lubricated between operations.

In preparing the machine for the reception of a fresh cal-boy, theoperator usually projects the mandrel into the mold before closingthe-mold and shifting the pressure mechanism D to an operative position.

The present invention constitutes, in some respects, an improvement onthe invention set forth and claimed in my pending appli cation No.265,0at0, filed December 2, 1918.

The foregoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitation should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible in view of the prior art.

hat I regard as new, and desire to secure by Letters Patent, is:

j 1. In a machine for the purpose set forth, the combination of a moldprovided with an opening for receiving the neck of a container and anopposed opening for receiving a mandrel, said mold being provided at oneside of the mold-cavity with a chargereeeiving cavity, a mandrelnormally projecting into the "mold-cavity, and pressure mechanismprovided with a plunger working snugly through said charge-receivingcavity and having an end-portion adapted to substantially register withand serve as a section of the wall of the mold-cavity at the end of thepressing operation.

2. In a machine for the purpose set forth, the combination of a moldcomprising longitudinally separable sections adapted to receive betweenthem the neck of a container, said mold being provided at one side ofthe mold-cavity with a passage for a plunger, pressure mechanism havinga plunger working through said passage and having its inner end-portionadapted to substantially register with and serve as a portion of thewall of the moldcavity, a mandrel normally extending into themold-cavity, and means for projecting and withdrawing said mandrel,

3. In a machine for the purpose set forth, the combination oi a fixedlower mold.- section, a pair of complemental upper mold sectionsprovided with complemental upward extensions afi'ording between them aplunger passage, said upper sections being mounted to swing onhorizontal pivots, a plunger working through said plunger passage andadapted to force plastic glass into the mold-cavity, said mold having atits forward side an opening for receiving the neck of a contalner, andhaving at ts rear side an opening for the receptlon of a mandrel, a

mandrel projecting into the mold-cavity and equipped with sheathablesections provided with thread-segments, and means for projecting andsheathing the segments of the mandrel and for projecting and retract ingthe mandrel.

4:. In a machine for the purpose set forth,

,the combination of a mold comprising longitudinally separable sectionsadapted to receive between them the neck of a container said mold beingprovided at one side 0' the mold-cavity with a plunger passage, pressuremechanism provided with a plunger working in said passage, a mandrel eX-tending into the mold-cavity and equipped with collapsiblethread-forming means and a pressure-actuated piston device adapted toproject and retract said mandrel.

5. In a machine for the purpose set forth, the combination of a moldcomprising longi' tudinally separable sections adapted to re ceivebetween them the neck of a container and an opposed mandrel, said moldbeing provided at one side of the mold-cavity with a charge-receivingcavity, a mandrel extending into the mold-cavity and equipped withexpansible thrmd-forming means, a slidable member on said mandreladapted to actuate said expansible thread-forming means, apressureactuated piston device adapted to actuate said slidable memberand to project and retract the mandrel, and pressure mechanism providedwith a plunger adapted to force the plastic material from saidcharge-receiving cavity into the moldcavity.

6. In a machine tor the purpose set forth, the combination of a moldcomprising longitudinally separable sections adapted to receive betweenthem the neck of a container and an opposed mandrel, said mold beingprovided at one side of the mold-cavity with a charge-receiving cavity,a mandrel-guide, a mandrel movable longitudinally therein and adapted tobe projected into the moldcavity, a stop limiting the movement ofprojection of the mandrel, a pair of levers mounted on the mandrel andprovided with thread-forming segments, a lever-actuating member slidablymounted 'on the mandrel, spring-connections between said lever-actuatingmember and said mandrel, and mechanism adapted to project the mandrelthrough the medium of said lever-actuating member and spring until, thestop is engaged and then to actuate said levers to project thethread-forming segments.

7. In a machine for the purpose set forth, the combination of a mol dcomprising longitudinally separable sections adapted to receive betweenthem the neck of a container and an opposed mandrel, said mold beingprovided at one side of the mold-cavity with a charge-receiving cavity.a mandrel guide, a mandrel movable longitudinally therein and adapted tobe projected into the moldcavity, a stop limiting the movement ofprojection of the mandrel, a pair of levers mounted on the mandrel andprovided with thread-forming segments, a lever-actuating 'shiftablymounted pressure mechanism provided with a plunger adapted to forceplastic material from the charge-receiving cavity into the mold-cavity.

8. In a machine for the purpose set forth, the combination of a moldcomprising longitudinally separable sections adapted to receive betweenthem the neck of a container and an opposed mandrel, said mold beingprovided at one side of the mold-cavity with a charge-receiving cavity,a mandrel-guide, a mandrel longitudinally movable therein andequipped'with a stop adapted to limit projection of the mandrel, andmandrel having a tip-portion adapted to extend into the container-mouthwithin the mold, said tipportion having an enlarged base and beingprovided with slots, a pair of levers pivotally mounted in said slotsand equipped at their front ends with thread-segment forming means, aleveractuating member slidably mounted on said mandrel, springconnection between said lever-actuating member and saidmandrel, a stopon said mandrel a short distance in the rear of said lever-actuatingmember, a cross-head interposed between said lever-actuating member, andthe adjacent stop, said mandrel extending freely through saidcross-head, a pressure-actuating piston device carrying said cross-head,and shiftably mounted pressure mechanism provided with a plunger adaptedto force plastic material from the charge-- receiving cavity into themold-cavity.

9. In a machine for the purpose set forth, a mandrel-guide, a tubularmandrel longitudinally movable in said guide and equipped with atip-portion adapted to project into a mold, eXpansible thread-formingsegments mounted in recesses in the tip-portion of the mandrel, anactuating member for said segments slidably mounted on the mandrel, atension springwithin the mandrel having its front end connected withsaid segment-actuating member and having its rear end connected with themandrel, a

reeiprocable member adapted to project the mandrel through the medium ofsaid segment-actuatlng member and sprmg, and a stop on the mandreladapted to be engaged by said last-named member to effect withdrawal ofthe mandrel.

10. In a machine for the purpose set forth, the combination of apiston-actuating crosshead, a mandrel extending through said cross-head,a guide for said mandrel, a stop on said mandrel adapted to limit themovement of projection of the mandrel, expansible thread-formingsegments mounted on the mandrel, an actuating member for saidthread-forming segments mounted on the mandrel and adapted to be engagedby said cross-head, spring connections between said last-named memberand said mandrel. whereby the mandrel may be projected through themedium of said last -named member, and a stop on the mandrel :ulapted tobe engaged by said cross-head to eii'ect withdrawal of the mandrel afterthe collapsing of the thread-forming segments.

11. In a machine for the purpose set forth, the combination of a moldcomprising longitudinally separable sections adapted to receive betweenthem the neck of a container and an opposed mandrel, said mold beingprovided at one side of the mold-cavity with a chargereceiving cavity ofrm-tangular cross-section, pressure mechanism provided with a plunger ofrectangular cross-section working snugly through said charge receivingcavity and having a lower end adapted to serve as a section of the wallof the moldcavity when the plunger is in depressed position, a mandrel,and means for projecting the mandrel into the mold and withdrawing ittherefrom.

12. In a machine for the purpose set forth, the combination of a moldcomprising longitudinally separable sections adapted to receive betweenthem the neck of a container and an opposed mandrel, said mold beingprovided at one side of the mold-cavity with a charge-receiving cavityof rectangular cross-section, pressure mechanism provided with a plungerof rectangular crosssection working snugly through said chargereceivingcavity and having an inclined concave lower end wall adapted to serve asa section of the wall of the mold-cavity when the plunger is indepressed position, a mandrel, and means for projecting the mandrel intothe mold and withdrawing it therefrom.

13. In a machine of the character sct forth, the combination of a-bedplate, a lower mold-section fixedly mounted thereon and a pair ofcomplemental upper mold-sections provided with complemental upwardextensions aflording a charge-receiving cavity, said upper mold-sectionsbeing pivotally mounted to permit them to be swung to open position, amandrel disposed above the bed-plate and having an operative endequipped with thread-forming means, means for effecting projection andwithdrawal of the mandrel, bod.il shit'ta'ble pressure mechanismdisposed a ove the mold and equipped with a plunger adapted to force acharge from the charge-receiving cavity into the mold-cavity,mold-locking means shifta'ble with said pressure mechanism and adaptedto maintain the mold in locked condition while the pressure mechanism isin the retracted position permitting introduction of plastic materialinto the chargereceiving cavity, and a mold-locking member mounted onsaid plunger and withdrawable thereby when the plunger is lifted.

1a. The method of providing the neck of a carboy with a reinforcing headand 1nouthportion, which comprises: introducing the carboy-neck andawithdrawahle mandrel through opposed openings in a mold which isprovided with a mold-cavity and at one side of said mold-cavity with aplungerpassage, introducing plattic material into said plunger-passageand completely expressing said material from the plungerpassage into the1noldcavity by means of a plunger which works snugly in theplungerpassage and has a lower end which affords a section of the wallof the mold-cavity, the car-boy-neck being allowed to recede from themold sufficiently to compensate for any excess of material introducedinto the chargereceiving cavity.

15. The method of providing the neck of a cal-boy with a reinforcinghead and mouth portion, which comprises: introducing the carboy-neck andan opposed withdrawable mandrel into a sectional mold which is providedwith a mold-cavity and a plungerpassage opening into one side of themoldcavity; introducing into the plunger-passage a charge of plasticmaterial slightly in excess of the amount which will be accommodated hythe mold-cavity; and completely forcing the charge of material from thecharge-receiving cavity into the mold 'avity by means of a plunger whoseinner end conforms to and affords a section of the wall of themoldcavity.

1,6. In a machine for the purpose set forth, the combination of a moldComprising longitudinally separable sections adapted to receive betweenthem the neck of a container I and an opposed mandrel, said. mold beingprovided at one side of the mold-cavity with a charge-receiving cavity,pressure mechanism provided with a plunger conforming to and workingsnugly through said chargereceiving cavity and having a lower endadapted to register with and serve as a section of the wall of themold-cavity when the plunger is in depressed position, a mandrel, andmeans for projecting the mandrel into the mold and withdrmving ittherefrom.

HARRY M. BROWN.

